Hydraulic rock drill impact testing device
By designing an impact testing device for hydraulic rock drills, simulation and real-time performance monitoring of different rock strata conditions were achieved, solving the problem of insufficient simulation and monitoring in existing devices, and improving the accuracy of testing and the safety of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FILOT (JIANGSU) INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-11-24
- Publication Date
- 2026-07-31
AI Technical Summary
Existing hydraulic rock drill impact testing devices cannot reproduce the hardness differences of different rock layers, resulting in large deviations between test results and actual working conditions. This makes it impossible to verify the adaptability of rock drills in complex scenarios. Furthermore, the lack of real-time monitoring of impact force, frequency, deformation of simulated parts, and fatigue of elastic structures makes it difficult to accurately determine whether the performance meets the standards and whether the early warning device is damaged.
An impact testing device for a hydraulic rock drill was designed, comprising a frame assembly, a movable mechanism, a simulated rock assembly, a detection mechanism, and a hydraulic rock drill assembly. Through the movable frame, servo motor, lead screw, and magnetic flux monitoring structure, the device enables automated, high-precision position adjustment and real-time performance monitoring of the rock drill, simulates different rock strata conditions, and simulates complex rock strata using replaceable simulated component materials.
It achieves comprehensive simulation of working conditions and authenticity of test results, precise performance judgment and equipment protection, improves testing efficiency and safety, can provide early warning of device damage, and extend equipment life.
Smart Images
Figure CN121558386B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of impact testing, specifically an impact testing device for a hydraulic rock drill. Background Technology
[0002] As a core piece of equipment in mining and tunnel construction, the impact performance of hydraulic rock drills directly affects project efficiency and safety. Therefore, their performance must be verified by professional testing equipment before leaving the factory. While existing hydraulic rock drill impact testing devices (as described in application publication number CN118603476A) have solved problems such as high material loss, cooling water splashing, and equipment vibration in traditional testing, the following key unresolved defects still exist: Simulating the impacted object solely with plates of fixed hardness cannot replicate the hardness differences of different rock strata (such as soft rock, hard rock, and weathered rock) in actual construction, resulting in significant deviations between test results and actual working conditions. This makes it impossible to fully verify the adaptability of rock drills in complex scenarios. Furthermore, the lack of real-time monitoring of impact force, frequency, steel plate deformation, and elastic structure fatigue makes it impossible to accurately determine whether the rock drill's impact performance meets the standards, and it is also difficult to provide early warnings of structural damage to the testing device itself. Therefore, a hydraulic rock drill impact testing device is proposed. Summary of the Invention
[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.
[0004] Given the following technical problems in the existing technology: the existing device only uses steel plates of fixed hardness to simulate the impact object, which cannot reproduce the hardness difference of different actual rock layers such as soft rock and hard rock. This results in a single working condition simulation, and the test results deviate greatly from the engineering scenario, making it difficult to verify the adaptability of the rock drill in complex scenarios. The existing device lacks real-time monitoring of impact force, frequency, deformation of the simulated parts and fatigue of the elastic structure. It cannot accurately determine whether the performance of the rock drill meets the standard, nor can it provide early warning of structural damage to the test device itself, which poses the risk of inaccurate judgment and equipment failure.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A hydraulic rock drill impact testing device, comprising a frame assembly, a movable mechanism, a simulated rock assembly, a detection mechanism, and a hydraulic rock drill assembly. The frame assembly includes a base plate, a first support, and a second support. The first support is provided at one end of the base plate, and the second support is provided at the other end. The movable mechanism is movably connected to the first support, and the hydraulic rock drill assembly is provided on the movable mechanism. Several detection mechanisms are provided on one side of the second support, and several simulated rock assemblies are provided on the other side of the second support. Each simulated rock assembly corresponds to one of the detection mechanisms.
[0006] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the movable mechanism also includes a movable frame one, a movable frame two, and a fixing bolt. The movable frame one is U-shaped and is mounted on a support one. The movable frame one is slidably connected to the support one. Two ribs are provided on the upper side of the movable frame one. The ribs are inserted into the movable frame two and slidably connected to the movable frame two. The extension direction of the ribs is perpendicular to the vertical plane of the support one. The movable frame two is L-shaped. One end of the movable frame two is connected to the movable frame one by a fixing bolt. The fixing bolt passes through the movable frame two and is threadedly connected to the movable frame one. The position of the hydraulic rock drill components can be flexibly adjusted by sliding the movable frame one and the support one, and by sliding the movable frame two and the ribs. The fixing bolt can quickly lock the position to meet the adjustment requirements of different test points.
[0007] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the simulated rock assembly includes movable columns, a simulated component, and a movable plate. Each simulated rock assembly contains four movable columns. One end of each movable column is fixedly connected to a second support. A movable plate and a simulated component are movably sleeved on the movable column. A return spring connects the movable plate and the simulated component. A return spring also connects the movable plate and the second support. The return spring is sleeved on the movable column. The movable plate is connected to a vent hole. The four movable columns can stably guide the simulated component and the movable plate. The return spring can simulate the elastic feedback of the rock after impact. At the same time, the movement of the movable plate can transmit the displacement generated by the impact, providing physical signals for subsequent testing.
[0008] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the frame assembly also includes a limiting groove one and a limiting groove two. One limiting groove one and two limiting grooves two are formed at the top of the support one. The limiting groove one and limiting groove two are parallel to each other, and the limiting grooves two are located on both sides of the limiting groove one. The movable mechanism also includes a servo motor and a lead screw. Four rollers are rotatably connected to the bottom of the movable frame one, with each pair of rollers forming a group. The rollers extend into the limiting groove two and are movably connected to the inner bottom wall of the limiting groove two. A lead screw nut is installed in the middle of one side of the support frame. The lead screw nut extends into the limiting groove. The lead screw is rotatably connected inside the limiting groove. The lead screw and the lead screw nut are threaded together. A servo motor is installed on the outside of the support frame. The power output end of the servo motor is connected to the lead screw. The limiting groove can accurately guide the movement of the movable frame and prevent deviation. The servo motor drives the lead screw to move the movable frame, which can realize the automated and high-precision position adjustment of the hydraulic rock drill components. The roller can reduce movement friction and improve the smoothness of adjustment.
[0009] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the simulation component includes a substrate layer and a hard rock simulation layer. One side of the substrate layer is connected to the hard rock simulation layer, and the other side of the substrate layer is connected to a return spring. The substrate layer can provide stable support for the hard rock simulation layer, preventing the hard rock simulation layer from breaking or deforming directly when impacted. At the same time, by replacing the hard rock simulation layer with a different material, different hard rock working conditions can be simulated.
[0010] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the simulation component includes a substrate layer, a hard rock simulation layer, an outer surface layer, a snap-fit bracket, mating grooves, and locking bolts. The substrate layer and the outer surface layer are arranged in parallel, with the hard rock simulation layer positioned between them. Two mating grooves are respectively formed at both ends of the outer surface layer on the side away from the hard rock simulation layer. The snap-fit bracket is U-shaped, and two mating grooves are also formed at both ends of the substrate layer on the side away from the hard rock simulation layer. One end of the snap-fit bracket is inserted into the mating groove of the outer surface layer, and the other end is inserted into the mating groove of the substrate layer. A locking bolt is threaded onto one end of the snap-fit bracket, and one end of the locking bolt abuts against the outer surface layer. The insertion and engagement of the mating grooves and the snap-fit bracket allows for rapid assembly of the substrate layer, the hard rock simulation layer, and the outer surface layer. The locking bolts ensure a tight connection between the layers, preventing loosening during impact, and also facilitate the disassembly and replacement of different layer structures, expanding the range of simulated working conditions.
[0011] As a preferred technical solution for the impact testing device of a hydraulic rock drill, the simulation component also includes a soft rock simulation layer. The outer layer is made of cast iron, and the soft rock simulation layer is set in the middle of the outer layer. The cast iron outer layer can provide sufficient structural strength. The soft rock simulation layer can simulate the composite rock strata working condition of "soft rock outer layer + hard rock inner layer", which is closer to the actual construction scenario. Moreover, the soft rock simulation layer can be replaced separately, reducing the testing cost.
[0012] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the testing mechanism includes a movable connecting rod, a connecting frame, and a working cylinder. Several connecting frames are evenly arranged on the outer side of the working cylinder. The end of the connecting frame away from the working cylinder is fixedly connected to a second support. One end of the movable connecting rod is fixedly connected to the middle of the movable plate, and the other end of the movable connecting rod is movably inserted into the working cylinder. The connecting frame can stably fix the working cylinder on the second support. The movable connecting rod can transmit the displacement of the movable plate to the inside of the working cylinder, providing a motion transmission path for subsequent impact parameter testing and ensuring accurate transmission of the test signal.
[0013] As a preferred technical solution for a hydraulic rock drill impact testing device, the hydraulic rock drill assembly includes a hydraulic rock drill and a hammer holder. The hydraulic rock drill is fixedly connected to the movable frame by locking bolts. The movable end of the hydraulic rock drill is threadedly connected to the hammer holder. The hammer holder movably abuts against the simulation part. The locking bolts facilitate the disassembly and maintenance of the hydraulic rock drill. The threaded hammer holder can be replaced with different models of hardness or shape according to the material of the simulation part, avoiding excessive wear of the hammer holder from affecting the test accuracy, while ensuring that the impact force is stably applied to the simulation part.
[0014] As a preferred technical solution for an impact testing device for a hydraulic rock drill, the inner wall of the movable connecting rod cavity is provided with a coil, an insulating layer, and a second permanent magnet plate from the inside out. The second permanent magnet plate is inclined. A movable magnet system is provided in the middle part of the movable connecting rod located in the inner cavity of the working cylinder. The movable magnet system includes an inclined permanent magnet plate, the inclination angle of which is the same as that of the second permanent magnet plate. The first permanent magnet plate is arranged in a ring array around the connecting column. A circular plate is connected to each end of the connecting column. Each circular plate is provided with an elastic ring. A limit ring is provided on the side of the elastic ring away from the circular plate. The limit ring is connected to the other part of the movable connecting rod. The inclined permanent magnet plate and the second permanent magnet plate can generate a significant change in magnetic flux when the movable connecting rod moves. The coil can convert the change in magnetic flux into an electrical signal. The insulating layer can prevent the coil from short-circuiting. The elastic ring and the limit ring can buffer the movement of the movable magnet system, reduce collision wear, ensure stable detection signals, and extend the service life of the device.
[0015] The beneficial effects of the hydraulic rock drill impact testing device of the present invention are as follows: the working condition simulation is comprehensive, the test results are more realistic, and the simulation component is equipped with replaceable soft rock simulation layer and hard rock simulation layer. The soft rock layer can be made of materials such as PVC foam board, and the hard rock layer can be made of materials such as high-strength cement mortar board, which can flexibly simulate rock layers of different hardness. With the combination of the outer layer and the snap-fit frame, it can restore complex working conditions such as "soft rock outer layer + hard rock inner layer", covering common scenarios in mining and tunnel construction, and eliminating the deviation of existing devices that only simulate one type of rock. Precise parameter monitoring, balancing performance assessment and equipment protection, is achieved through a magnetic flux monitoring structure composed of coils, permanent magnet plate one, and permanent magnet plate two, combined with a voltage sensor, which can capture impact frequency and force in real time. The cooperation between the movable plate and the return spring reflects the deformation of the simulated parts, and long-term fluctuations in the voltage signal can determine the fatigue state of the elastic structure. This not only accurately determines the performance of the rock drill but also provides early warning of device damage, extending equipment life. Flexible operation and adaptation result in higher testing efficiency. The movable mechanism uses a servo motor and lead screw to move the hydraulic rock drill components, allowing for quick alignment with different simulated parts without frequent disassembly and assembly. Simulated parts can be quickly assembled and replaced layer by layer through mating grooves and locking bolts, shortening the working condition switching time, adapting to multiple specification testing needs, and improving testing efficiency. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 For the present invention Figure 3 A partially enlarged structural diagram of part A in the middle; Figure 5 This is a schematic diagram of the structure of the outer surface layer and the soft rock simulation layer of the present invention; Figure 6 This is a schematic diagram of the internal structure of the working cylinder of the present invention; Figure 7 This is a schematic diagram of the internal structure of the permanent magnet plate of the present invention.
[0017] Reference numerals: 100, Frame assembly; 101, Base plate; 102, Support 1; 103, Support 2; 104, Limiting groove 1; 105, Limiting groove 2; 200, Movable mechanism; 201, Movable frame 1; 202, Movable frame 2; 203, Fixing bolt; 204, Servo motor; 205, Lead screw; 206, Roller; 300, Simulated rock assembly; 301, Movable column; 302, Simulated component; 3021, Substrate layer; 3022, Hard rock simulation layer; 3023, Outer layer; 3024, Snap-fit. Frame; 3025, mating groove; 3026, locking bolt; 3027, soft rock simulation layer; 303, movable plate; 400, detection mechanism; 401, working cylinder; 402, connecting frame; 403, movable connecting rod; 404, vent hole; 405, limit ring; 406, permanent magnet plate one; 407, elastic ring; 408, coil; 409, permanent magnet plate two; 410, insulation layer; 411, circular plate; 412, connecting column; 500, hydraulic rock drill assembly; 501, hydraulic rock drill; 502, hammer base. Detailed Implementation
[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0019] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.
[0020] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.
[0021] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.
[0022] like Figures 1-7As shown, the present invention proposes an impact testing device for a hydraulic rock drill, comprising a frame assembly 100, a movable mechanism 200, a simulated rock assembly 300, a detection mechanism 400, and a hydraulic rock drill assembly 500. The frame assembly 100 includes a base plate 101, a first support 102, and a second support 103. The first support 102 is provided at one end of the base plate 101, and the second support 103 is provided at the other end. The movable mechanism 200 is movably connected to the first support 102, and the hydraulic rock drill assembly 500 is provided on the movable mechanism 200. Several detection mechanisms 400 are provided on one side of the second support 103, and several simulated rock assemblies 300 are provided on the other side of the second support 103. The simulated rock assemblies 300 correspond one-to-one with the detection mechanisms 400.
[0023] The movable mechanism 200 also includes a movable frame 1 201, a movable frame 202, and a fixing bolt 203. The movable frame 1 201 is U-shaped and is fitted onto the support 1 102. The movable frame 1 201 and the support 1 102 are slidably connected. Two ribs are provided on the upper side of the movable frame 1 201. The ribs are inserted into the movable frame 202 and are slidably connected to the movable frame 202. The extension direction of the ribs is perpendicular to the vertical plane of the support 1 102. The movable frame 202 is L-shaped. One end of the movable frame 202 is connected to the movable frame 1 201 by the fixing bolt 203. The fixing bolt 203 passes through the movable frame 202 and is threadedly connected to the movable frame 1 201. The position of the hydraulic rock drill assembly 500 can be flexibly adjusted by sliding the movable frame 1 201 and the support 1 102 and by sliding the movable frame 202 and the ribs. The fixing bolt 203 can quickly lock the position to meet the adjustment requirements of different test points.
[0024] The simulated rock assembly 300 includes movable columns 301, simulated components 302, and movable plates 303. Each simulated rock assembly 300 contains four movable columns 301. One end of each movable column 301 is fixedly connected to a second support 103. Movable plates 303 and simulated components 302 are movably sleeved on the movable columns 301. A return spring is connected between the movable plate 303 and the simulated component 302. A return spring is also connected between the movable plate 303 and the second support 103. The return spring is sleeved on the movable column 301. The movable plate 303 is connected to a vent 404. The four movable columns 301 can stably guide the simulated component 302 and the movable plate 303. The return spring can simulate the elastic feedback of the rock after being impacted. At the same time, the movement of the movable plate 303 can transmit the displacement generated by the impact, providing physical signals for subsequent testing.
[0025] The frame assembly 100 also includes a first limiting groove 104 and a second limiting groove 105. The top of the first bracket 102 has one first limiting groove 104 and two second limiting grooves 105. The first limiting groove 104 and the second limiting grooves 105 are parallel to each other, and the second limiting grooves 105 are located on both sides of the first limiting groove 104. The movable mechanism 200 also includes a servo motor 204 and a lead screw 205. Four rollers 206 are rotatably connected to the bottom of the movable frame 201, with each pair of rollers forming a group. The rollers 206 extend into the second limiting groove 105 and are movably connected to the inner bottom wall of the second limiting groove 105. A lead screw nut is provided in the middle of the lower side, which extends into the limiting groove 104. A lead screw 205 is rotatably connected inside the limiting groove 104. The lead screw 205 is threadedly connected to the lead screw nut. A servo motor 204 is provided on the outside of the bracket 102. The power output end of the servo motor 204 is connected to the lead screw 205. The limiting groove can accurately guide the movement of the movable frame 201 to avoid deviation. The servo motor 204 drives the lead screw 205 to move the movable frame 201, which can realize the automated and high-precision position adjustment of the hydraulic rock drill component 500. The roller 206 can reduce movement friction and improve the smoothness of adjustment.
[0026] The simulation component 302 includes a substrate layer 3021 and a hard rock simulation layer 3022. The hard rock simulation layer 3022 is connected to one side of the substrate layer 3021 and the other side of the substrate layer 3021 is connected to a return spring. The substrate layer 3021 can provide stable support for the hard rock simulation layer 3022, preventing the hard rock simulation layer 3022 from breaking or deforming directly when it is impacted. At the same time, by replacing the hard rock simulation layer 3022 with a different material, hard rock working conditions of different hardness can be simulated.
[0027] Simulation component 302 includes a substrate layer 3021, a hard rock simulation layer 3022, an outer surface layer 3023, a snap-fit bracket 3024, mating grooves 3025, and locking bolts 3026. The substrate layer 3021 and the outer surface layer 3023 are arranged in parallel, and the hard rock simulation layer 3022 is disposed between the substrate layer 3021 and the outer surface layer 3023. Two mating grooves 3025 are respectively formed at both ends of the outer surface layer 3023 on the side away from the hard rock simulation layer 3022. The snap-fit bracket 3024 is U-shaped, and two mating grooves 3025 are also respectively formed at both ends of the substrate layer 3021 on the side away from the hard rock simulation layer 3022. 25. One end of the snap-fit bracket 3024 is inserted into the mating groove 3025 of the outer layer 3023, and the other end is inserted into the mating groove 3025 of the substrate layer 3021. One end of the snap-fit bracket 3024 is threadedly connected to a locking bolt 3026. One end of the locking bolt 3026 abuts against the outer layer 3023. The insertion and engagement of the mating groove 3025 and the snap-fit bracket 3024 can quickly assemble the substrate layer 3021, the hard rock simulation layer 3022 and the outer layer 3023. The locking bolt 3026 can ensure that the connection between the layers is tight, avoid the loosening between the layers during impact, and facilitate the disassembly and replacement of different layer structures, thus expanding the range of simulation conditions.
[0028] The simulation component 302 also includes a soft rock simulation layer 3027. The outer layer 3023 is made of cast iron. The soft rock simulation layer 3027 is provided in the middle of the outer layer 3023. The cast iron outer layer 3023 can provide sufficient structural strength. The soft rock simulation layer 3027 can simulate the composite rock strata working condition of "soft rock outer layer + hard rock inner layer", which is closer to the actual construction scenario. Moreover, the soft rock simulation layer 3027 can be replaced separately, reducing testing costs.
[0029] The testing mechanism 400 includes a movable connecting rod 403, a connecting frame 402, and a working cylinder 401. Several connecting frames 402 are evenly arranged on the outer side of the working cylinder 401. The end of the connecting frame 402 away from the working cylinder 401 is fixedly connected to the second support 103. One end of the movable connecting rod 403 is fixedly connected to the middle of the movable plate 303, and the other end of the movable connecting rod 403 is movably inserted into the working cylinder 401. The connecting frame 402 can stably fix the working cylinder 401 on the second support 103. The movable connecting rod 403 can transmit the displacement of the movable plate 303 to the inside of the working cylinder 401, providing a motion transmission path for subsequent impact parameter testing and ensuring accurate transmission of the test signal.
[0030] The hydraulic rock drill assembly 500 includes a hydraulic rock drill 501 and a hammer holder 502. The hydraulic rock drill 501 is fixedly connected to the movable frame 202 by locking bolts. The movable end of the hydraulic rock drill 501 is threadedly connected to the hammer holder 502. The hammer holder 502 is in movable contact with the simulation part 302. The locking bolts facilitate the disassembly and maintenance of the hydraulic rock drill 501. The threaded hammer holder 502 can be replaced with different models of hardness or shape according to the material of the simulation part 302 to avoid excessive wear of the hammer holder 502 affecting the test accuracy, while ensuring that the impact force is stably applied to the simulation part 302.
[0031] The inner wall of the movable connecting rod 403, from the inside to the outside, is provided with a coil 408, an insulating layer 410, and a second permanent magnet plate 409. The second permanent magnet plate 409 is inclined. A movable magnet system is provided in the middle part of the movable connecting rod 403 within the working cylinder 401. The movable magnet system includes an inclined permanent magnet plate 406, the inclination angle of which is the same as that of the second permanent magnet plate 409. The first permanent magnet plates 406 are arranged in a ring array around the connecting post 412. A circular plate 411 is connected to each end of the connecting post 412. Each plate 411 is equipped with an elastic ring 407. A limit ring 405 is provided on the side of the elastic ring 407 away from the circular plate 411. The limit ring 405 is connected to the other parts of the movable connecting rod 403. The inclined permanent magnet plate 406 and permanent magnet plate 409 can generate a significant change in magnetic flux when the movable connecting rod 403 moves. The coil 408 can convert the change in magnetic flux into an electrical signal. The insulating layer 410 can prevent the coil 408 from short-circuiting. The elastic ring 407 and the limit ring 405 can buffer the movement of the movable magnet system, reduce collision wear, ensure stable detection signals, and extend the service life of the device.
[0032] The material for the soft rock simulation layer 3027 is selected from one of the following: PVC foam board, epoxy resin-based composite board, and pine plywood; PVC foam board: uniaxial compressive strength of approximately 5~15MPa, low density of 0.3~0.8g / cm³. 3 The material exhibits moderate toughness, showing noticeable dents or localized breakage upon impact, consistent with the characteristics of soft rock being "easy to chisel in but not easily fractured." Epoxy resin-based composite panels, with added calcium carbonate and glass microspheres to adjust strength, can maintain compressive strength between 10 and 25 MPa. Their good material uniformity avoids interference from the natural bedding of soft rock, making them suitable for standardized simulation. Pine wood veneer, made from high-density, dried pine, has a compressive strength of approximately 8-12 MPa. It possesses natural texture and a degree of brittleness, simulating the "bedding breakage" phenomenon of soft rock; however, it's crucial to control the moisture content to <12% to avoid parameter fluctuations. The 3027 soft rock simulation layer, made from different materials, simulates the outer layer of the rock strata.
[0033] The 3022 hard rock simulation layer is made of one of the following materials: high-strength cement mortar board, alumina ceramic board, or artificial granite. High-strength cement mortar board: uses 42.5R cement and quartz sand in a 1:2 ratio. After 28 days of curing, its compressive strength reaches 60-100 MPa; its hardness is close to that of medium-hard granite, and it exhibits radial cracks upon impact, with a fracture pattern consistent with hard rock characteristics. Alumina ceramic board: made of 75%-85% pure alumina ceramic, with a compressive strength of approximately 200-300 MPa and high hardness (Mohs hardness 8.5), suitable for simulating extremely hard rocks such as quartzite; however, it is extremely brittle and will fracture instantly upon impact, requiring careful attention to the fixing method. Artificial granite: uses epoxy resin as a binder, mixed with quartz sand and granite fragments with a particle size of 2-5 mm, achieving a compressive strength of 80-150 MPa; its density is close to that of natural granite, at 2.5-2.7 g / cm³. 3 It can restore the characteristics of hard rock that is difficult to drill and has large fragmented pieces.
[0034] The substrate 3021 is a steel plate. The return springs K values at both ends of the movable plate 303 are different.
[0035] The coil 408 is connected to a voltage sensor, and the performance data of the hydraulic rock drill assembly 500 impacting the simulation component 302 is characterized by measuring the frequency and amplitude changes of the voltage change of the voltage sensor.
[0036] The specific implementation method is as follows: The servo motor 204 controls the rotation of the lead screw 205 to move the movable frame 202, thereby adjusting the hydraulic rock drill assembly 500 to align with different simulation elements 302. The simulation elements 302 can be configured with different material combinations to simulate different rock formations, including rock formations without an outer soft rock layer, rock formations with an outer soft rock layer, and outer soft and hard rock structures are also simulated using different materials. When the hammer seat 502 is aligned with the center of a simulation element 302, the hydraulic rock drill 501 controls the hammer seat 502 to impact the simulation element 302. During the impact, the simulation element 302 reciprocates due to the impact. The simulation component 302 moves along the movable plate 303 via a return spring. The movable plate 303 reciprocates via the movable connecting rod 403. The movable connecting rod 403 moves along the permanent magnet plate 406. When the relative position of the permanent magnet plate 406 and the permanent magnet plate 409 changes, the distance between the permanent magnet plate 406 and the permanent magnet plate 409 changes continuously due to their tilt. The magnetic flux corresponding to the coil 408 changes. Therefore, the magnitude and amplitude of the movement rate of the permanent magnet plate 406 can be characterized by measuring the voltage change frequency and amplitude changes of the voltage sensor to represent the performance data when the hydraulic rock drill assembly 500 impacts the simulation component 302.
[0037] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.
[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A hydraulic rock drill percussion test device, characterized in that: The system includes a frame assembly (100), a movable mechanism (200), a simulated rock assembly (300), a detection mechanism (400), and a hydraulic rock drill assembly (500). The frame assembly (100) includes a base plate (101), a first support (102), and a second support (103). The first support (102) is provided at one end of the base plate (101), and the second support (103) is provided at the other end. The movable mechanism (200) is movably connected to the first support (102), and the hydraulic rock drill assembly (500) is provided on the movable mechanism (200). Several detection mechanisms (400) are provided on one side of the second support (103), and several simulated rock assemblies (300) are provided on the other side of the second support (103). The simulated rock assemblies (300) correspond one-to-one with the detection mechanisms (400). The simulated rock assembly (300) includes movable columns (301), simulated parts (302), and movable plates (303). Each simulated rock assembly (300) contains four movable columns (301). One end of the movable column (301) is fixedly connected to the second support (103). The movable plate (303) and the simulated parts (302) are movably sleeved on the movable column (301). A return spring is connected between the movable plate (303) and the simulated parts (302). A return spring is also connected between the movable plate (303) and the second support (103). The return spring is sleeved with the movable column (301). The movable plate (303) is connected to the vent (404). The simulation component (302) includes a substrate layer (3021), a hard rock simulation layer (3022), an outer surface layer (3023), a snap-fit bracket (3024), a mating groove (3025), and a locking bolt (3026). The substrate layer (3021) and the outer surface layer (3023) are arranged in parallel, and the hard rock simulation layer (3022) is disposed between the substrate layer (3021) and the outer surface layer (3023). Two mating grooves (3026) are respectively formed at both ends of the outer surface layer (3023) on the side away from the hard rock simulation layer (3022). 5) The shape of the clip bracket (3024) is U-shaped. Two mating grooves (3025) are also opened at both ends of the side of the substrate layer (3021) away from the hard rock simulation layer (3022). One end of the clip bracket (3024) is inserted into the mating groove (3025) of the outer layer (3023) and the other end is inserted into the mating groove (3025) of the substrate layer (3021). One end of the clip bracket (3024) is threaded with a locking bolt (3026), and one end of the locking bolt (3026) abuts against the outer layer (3023). The simulation component (302) also includes a soft rock simulation layer (3027), and the outer surface layer (3023) is made of cast iron. The soft rock simulation layer (3027) is provided in the middle of the outer surface layer (3023).
2. A hydraulic rock drill percussion testing device according to claim 1, characterized in that The movable mechanism (200) also includes movable frame one (201), movable frame two (202) and fixing bolt (203). Movable frame one (201) is U-shaped and is fitted on support one (102). Movable frame one (201) is slidably connected to support one (102). Two ribs are provided on the upper side of movable frame one (201). The ribs are inserted into movable frame two (202) and slidably connected to movable frame two (202). The extension direction of the ribs is perpendicular to the vertical plane of support one (102). Movable frame two (202) is L-shaped. One end of movable frame two (202) is connected to movable frame one (201) by fixing bolt (203). Fixing bolt (203) passes through movable frame two (202) and is threadedly connected to movable frame one (201).
3. A hydraulic rock drill percussion testing device according to claim 2, characterized in that: The frame assembly (100) also includes a limiting groove one (104) and a limiting groove two (105). The top of the bracket one (102) is provided with a limiting groove one (104) and two limiting grooves two (105). The limiting groove one (104) and the limiting groove two (105) are parallel to each other, and the limiting grooves two (105) are arranged on both sides of the limiting groove one (104). The active mechanism (200) also includes a servo motor (204) and a lead screw (205). The bottom of the active frame (201) is rotatably connected to four rollers (206), with each pair of rollers (206) forming a group. The rollers (206) extend into the limiting groove (105) and are rotatably connected to the inner bottom wall of the limiting groove (105). A lead screw nut is provided in the middle of the lower side of the active frame (201). The lead screw nut extends into the limiting groove (104). The inside of the limiting groove (104) is rotatably connected to the lead screw (205). The lead screw (205) is threadedly connected to the lead screw nut. A servo motor (204) is provided on the outside of the bracket (102). The power output end of the servo motor (204) is connected to the lead screw (205).
4. A hydraulic rock drill percussion testing device according to claim 1, characterized in that: The simulation component (302) includes a substrate layer (3021) and a hard rock simulation layer (3022). The hard rock simulation layer (3022) is connected to one side of the substrate layer (3021), and the other side of the substrate layer (3021) is connected to a return spring.
5. The hydraulic rock drill impact testing device according to claim 1, characterized in that: The testing mechanism (400) includes a movable connecting rod (403), a connecting frame (402), and a working cylinder (401). Several connecting frames (402) are evenly arranged on the outer side of the working cylinder (401). One end of the connecting frame (402) away from the working cylinder (401) is fixedly connected to the second bracket (103). One end of the movable connecting rod (403) is fixedly connected to the middle of the movable plate (303), and the other end of the movable connecting rod (403) is movably inserted into the working cylinder (401).
6. A hydraulic rock drill impact testing device according to any one of claims 1 to 5, characterized in that: The hydraulic rock drill assembly (500) includes a hydraulic rock drill (501) and a hammer holder (502). The hydraulic rock drill (501) is fixedly connected to the movable frame two (202) by locking bolts. The movable end of the hydraulic rock drill (501) is threadedly connected to the hammer holder (502). The hammer holder (502) is in movable contact with the simulation component (302).
7. The hydraulic rock drill impact testing device according to claim 5, characterized in that: The inner wall of the inner cavity of the movable connecting rod (403) is provided with a coil (408), an insulating layer (410) and a permanent magnet plate two (409) from the inside to the outside. The permanent magnet plate two (409) is inclined. The middle part of the movable connecting rod (403) located in the inner cavity of the working cylinder (401) is provided with a movable magnet system. The movable magnet system includes a permanent magnet plate one (406) with an inclined configuration. The inclination angle of the permanent magnet plate one (406) is the same as the inclination angle of the permanent magnet plate two (409). The permanent magnet plate one (406) is arranged in a ring array. The permanent magnet plate one (406) is arranged around the connecting column (412). A circular plate (411) is connected to each end of the connecting column (412). An elastic ring (407) is provided on each of the circular plates (411). A limit ring (405) is provided on the side of the elastic ring (407) away from the circular plate (411).